Full route cache in NextJS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of full route cache in Next.js?

Full route cache stores the entire rendered page output so that subsequent requests can be served instantly without re-rendering, improving performance and reducing server load.

intermediate

How does Next.js implement full route caching with the App Router?

Next.js uses server components and static rendering to cache the full HTML output of routes. When a route is requested again, the cached HTML is served directly unless invalidated.

intermediate

What triggers invalidation of the full route cache in Next.js?

Cache invalidation happens when data changes, server actions run, or when developers manually configure revalidation times, ensuring users see fresh content.

advanced

Explain the difference between full route cache and partial caching in Next.js.

Full route cache stores the entire page output, serving it instantly. Partial caching caches only parts of the page or data, requiring some rendering on each request.

beginner

Why is full route caching beneficial for SEO and user experience in Next.js?

Because cached pages load very fast and serve fully rendered HTML, search engines can index content easily and users get instant page loads, improving SEO and experience.

What does full route cache store in Next.js?

A User session information

B Only the JSON data for a route

C CSS styles only

D The entire rendered HTML of a route

Full route cache stores the entire rendered HTML output of a route to serve it instantly on subsequent requests.

When is the full route cache invalidated in Next.js?

A When data changes or revalidation time expires

B Every time a user clicks a link

C Only when the server restarts

D Never, it is permanent

Cache invalidation occurs when underlying data changes or when configured revalidation times expire to keep content fresh.

Which Next.js feature helps create full route cache?

A API routes

B Client-side only rendering

C Server Components with static rendering

D Dynamic imports

Server Components combined with static rendering enable Next.js to cache full route HTML output.

How does full route caching improve SEO?

A By hiding content from search engines

B By serving fully rendered HTML quickly to search engines

C By delaying page load

D By using client-side JavaScript only

Serving fully rendered HTML fast helps search engines index pages better, improving SEO.

What is a key difference between full route cache and partial caching?

A Full route cache stores entire page output; partial caches only parts

B Partial caching stores entire page output; full route caches only parts

C They are the same

D Partial caching caches CSS only

Full route cache saves the whole page output, while partial caching saves only some parts or data.

Describe how full route caching works in Next.js and why it matters.

Think about what is saved and how it affects loading speed and search engines.

Explain the difference between full route cache and partial caching in Next.js with examples.

Consider how much of the page is cached and when each is useful.

Practice

1. What does enabling full route cache in Next.js do for your page?

easy

A. It saves the entire page output to serve faster on next visits.

B. It disables all caching and forces server rendering every time.

C. It only caches API responses but not the page content.

D. It caches only images and static assets, not HTML.

Solution

1. Step 1: Understand full route cache purpose

   Full route cache stores the whole rendered page output to speed up loading.

2. Step 2: Compare options with this purpose

   Only "It saves the entire page output to serve faster on next visits." describes saving entire page output for faster serving.

3. Final Answer:

   It saves the entire page output to serve faster on next visits. -> Option A

4. Quick Check:

   Full route cache = saves full page output [OK]

Hint: Full route cache means caching the whole page output [OK]

Common Mistakes:

• Thinking it only caches API data
• Confusing with disabling cache
• Assuming it caches only images

2. Which code snippet correctly enables full route cache in a Next.js page component?

easy

A. export const cache = 'no-cache';

B. export const revalidate = 0;

C. export const dynamic = 'force-static';

D. export const dynamic = 'force-dynamic';

Solution

1. Step 1: Recall syntax for full route cache

   Next.js uses export const dynamic = 'force-static' to enable full route cache.

2. Step 2: Check each option

   Only "export const dynamic = 'force-static';" matches the correct syntax for full route cache.

3. Final Answer:

   export const dynamic = 'force-static'; -> Option C

4. Quick Check:

   Full route cache syntax = dynamic = 'force-static' [OK]

Hint: Use dynamic = 'force-static' to enable full route cache [OK]

Common Mistakes:

• Using 'force-dynamic' instead of 'force-static'
• Confusing cache control with dynamic export
• Setting revalidate to 0 disables caching differently

3. Given this Next.js page code, what will be the caching behavior?

export const dynamic = 'force-static';
export default function Page() {
  return <h1>Hello World</h1>;
}

medium

A. The page caches only API data but renders HTML dynamically.

B. The page is server rendered on every request without caching.

C. The page disables caching and reloads data on each visit.

D. The page is fully cached and served statically on all requests.

Solution

1. Step 1: Analyze the dynamic export value

   The code sets dynamic = 'force-static', which enables full static caching.

2. Step 2: Understand effect on page rendering

   This means the page HTML is cached fully and served statically on all requests.

3. Final Answer:

   The page is fully cached and served statically on all requests. -> Option D

4. Quick Check:

   dynamic = 'force-static' means full static cache [OK]

Hint: dynamic = 'force-static' means full static cache [OK]

Common Mistakes:

• Thinking it disables caching
• Assuming partial caching of API only
• Confusing with dynamic rendering

4. Identify the error in this Next.js page that tries to enable full route cache:

export const dynamic = 'force-static'

export default function Page() {
  return <div>Cached Page</div>;
}

medium

A. Missing semicolon after dynamic export causes syntax error.

B. No error; code correctly enables full route cache.

C. Page component must be async to enable caching.

D. Using 'force-static' is invalid; should be 'force-dynamic'.

Solution

1. Step 1: Check syntax correctness

   JavaScript allows omitting semicolons; no syntax error here.

2. Step 2: Verify caching value and component

   'force-static' is valid to enable full route cache; component can be normal function.

3. Final Answer:

   No error; code correctly enables full route cache. -> Option B

4. Quick Check:

   Code syntax and caching value are correct [OK]

Hint: Semicolons optional; 'force-static' is valid caching value [OK]

Common Mistakes:

• Assuming missing semicolon causes error
• Confusing 'force-static' with 'force-dynamic'
• Thinking component must be async

5. You want to optimize a mostly static blog page with some dynamic widgets. Which approach best uses full route cache in Next.js?

hard

A. Set export const dynamic = 'force-static' and load widgets client-side only.

B. Use dynamic = 'force-dynamic' to cache the whole page including widgets.

C. Disable caching and fetch all data server-side on every request.

D. Use revalidate = 0 to cache page but update widgets dynamically.

Solution

1. Step 1: Understand full route cache use case

   Full route cache works best for mostly static pages to serve fast.

2. Step 2: Handle dynamic widgets separately

   Loading widgets client-side keeps page static cache intact while showing dynamic content.

3. Step 3: Evaluate options

   Set export const dynamic = 'force-static' and load widgets client-side only. matches this approach; others either disable caching or cache dynamic parts incorrectly.

4. Final Answer:

   Set export const dynamic = 'force-static' and load widgets client-side only. -> Option A

5. Quick Check:

   Static page + client widgets = dynamic = 'force-static' [OK]

Hint: Cache static page, load dynamic parts client-side [OK]

Common Mistakes:

• Caching dynamic widgets server-side causing stale data
• Disabling cache unnecessarily
• Using force-dynamic which disables full route cache